Yokogawa 414 Batch Controller - Manual (Page 43)

Input Circuits 41
The Frequency Input Circuits
Pulse Input
Common
(9)
(8)
1K 100K
100R
S3
.01
S5
S8
1uF
+
+
-
INPUT COMPARATOR
S2
33K
+5V
33K 1K2
S4
S7
10K
+5V
2K4
S1
22K
S6